Question

questions 28 - 31 prompt
questions 28 - 31: complete the tables by filling in the correct number of protons, neutrons and electrons.
30
fill in the blank 1 point
isotope
manganese-55
charge
2+

protons

type your answer...

neutrons

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electrons

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Explanation:

Step1: Determine number of protons

Manganese (Mn) has an atomic number of 25, so the number of protons is equal to the atomic number. Thus, protons = 25.

Step2: Calculate number of neutrons

The mass number of Manganese - 55 is 55. The number of neutrons is calculated as mass number - atomic number. So, neutrons = 55 - 25 = 30.

Step3: Find number of electrons

The charge is 2+, which means the ion has lost 2 electrons. A neutral manganese atom has the same number of electrons as protons (25). So, for a \(Mn^{2+}\) ion, electrons = 25 - 2 = 23.

Answer:

• # protons: 25
• # neutrons: 30
• # electrons: 23